Roofing or surfacing material



May 6, 1941. s. L EASQN 2,241,058

' RooFING on sURFAcING-MATERIAL Filed July 16; 1940 `Patented May 6,

lUNITED STATES 1wirr-:NT oFFicE annoso Roor'nvcl on sum-Acum mmm Sidney Lanier Eason, charleston, s. c. g Application July 1s, 1940, sei-m No. 345,765

a claims.. (cl. s-1) This invention relates to roll roofing, and is an improvement upon the structures illustrated in my prior Patents Nos. 2,003,503 and 2,160,845,

-and my copending application Serial No. 276,789, in respect to the manner of obtaining a fabricto-fabric seal at the joining or lapping'areas of related courses of roofing.

In my aforesaid inventions I taught fabric-tofabric sealing relationship by the use of adhesively coated surfaces which were responsive to a hot iron or its equivalent, usually yfollowed by application of an after cement or coating composition to supplement the fabric-to-fabric seal thus developed.

In order to save labor in field application,- as well as to avoid complications in the manufacture and shipment of roll rooilng by' supplying a quantity of cement in liquid or plastic form, I develop the fabric-to-fabric seal in my present invention by means of a separate sealing strip` having cohesive ailinity for the pre-attached strip, flap or iiaps with which my roll L roofing is factory-equipped. Such sealing strip makes after-cementing unnecessary, thus effecting a worthwhile saving in labor and materials, while however, providing ample protection at the joint.

In the accompanying drawing:

Fig. 1 shows a typical joint at the overlapping edges of two related courses of roofing material each of which is provided at one edge with a foldable fabric flap strip, there being between the attaching area of one flap strip and the overfolded flap area of the other ilap strip an in-between fabric sealing strip having cohesive foldable fabric flap strip, the flap area of which is of greater length than the flap area of either of the ap strips shown in Fig. 1, the other roofing course being provided with a fabric selvage strip, and there being an in-between fabric sealing strip covering the nail heads and covered by the overfolded flap, said in|between sealing strip having fabric-to-fabric seal withL the selvage strip and with the flap strip.

a foldable fabric flap strip.

-in which both rooting courses are equipped with foldable fabric ap stripsA and these strips are themselves coated in certain areas with a substance having cohesive aflinity with the material of the ap strips, and

Fig. 5 is a section showing a still further variant in which both roong courses are provided at the upper and lower faces, respectively, of their overlapping edges with fabric selvage strips having cohesive affinity for one another.

'As disclosed generally in my aforesaid patents and patent applications, my present 'invention involves -mastic saturated or composition or coated roll roofing of conventional type which is equipped at the factory with fabric or equivalent ilap strips at one or both longitudinal edges, or with fixed fabric selvage strips, or with a foldable fabric flap strip at one longitudinal edge and a fixed fabric selvage strip at its opposite V longitudinal edge.

In all gures of the drawing, the boarding of a roof isindicated at i0 and is covered by related courses of composition A roofing material il and I2 which are overlapped as shown at their joining edges and nailed as at I3 to the roong. The joint thus produced is covered and protected by :a fabric-to-fabric seal developed in any of the several manners illustrated in Figs. 1 to 5 inclusive.

In' Fig. 1 each rooflngcourse has cemented or otherwise attachedto one marginal edge thereof The iiap strip of the course il comprises an attaching portion il and an overfolded flap portion i5. The flap strip of the course i2 comprises an attaching portion i6 and an overfolded flap portion I'I.

Between the iiap strips before the same are overfolded is placed a fabric sealing strip i! which carries a substance having cohesive ailinity for the material of the nap strips. When the flap portions ii and l1 are overfolded upon one another, the sealing strip is likewise overis completely enclosed. within said overfolded flap strips.`

1n ng. 2, the fabric-w-fabrlc sat1 is provided by-a fabric selvage strip 20 applied to the overlapping marginal edge of the roofing course Il and a sealing strip 2i .preferably coextensive Fig. 4 is a section showing still another variant 55 therewith and carrying` a substance having cohesive afnity for the material of the selvage strip.

In the joint of Fig. 3 the roofing course Il is provided at its overlapping marginal edge with sealing. strip I8 of Fig. 1, but extending a'sa single layer when the joint is made. The sealing strip 26 covers the nail heads but is covered by the portions 23-24 of the flap strip, being in fabric-to-fabric sealing relationship with all portions of the nap strip, and also being sealed down upon the selvage strip 25 and covered by the extended portion 24 of the flap strip.

In the joint of Fig. 4, both roofing courses Il and I2 are provided with foldable fabric ap strips 21-28 and 29-30, respectively, the portions 21 and 29 being attaching portions and the portions 28 and 30 being ap portions. The attaching portions 21 and 29 are attached to the respective courses of roofing material in any suitable manner. If adhesively attached, they are attached with an adhesive different from the adhesive coating which is applied to other areas of the flap strips. The exposed faces of said attaching portions 21 and 29, as well as the flap portions 28 and 30 are coated with a substance having cohesive-affinity for each other so that when the aps are folded into overlapping relationship these coated surfaces adhere to each other. The aforesaid coating substance is one,

however, which has the property of not adhering to other surfaces so that the unfolded flaps (or selvage edge strips, if selvage strips are substituted for the flap strips) will not adhere to the roofing when shipped in the roll. As an example of such substance I may use latex of the kind now on the market sold under the name Vu1tex, or rubber composition or similar as used in so-called friction tapes. Thus in this form of my invention I obtain a fabric-to-fabric seal Without the necessity of using a separate sealing strip as in Figs. 1 to 3 inclusive.

This is also true of the joint illustrated in Fig. 5.

In Fig. 5 the upper and lower surfaces of the respective roofing courses Il and I2 are provided at their overlapping edges with fabric selvage 2 Qantas strips 3l and 32. These strips are pretreated with a substance having cohesive ainity for each other and the joint is made by simply ilpressing the strips into pressure contact with each other.

In al1 forms where a sealing strip is used such strip will be furnished separately of the roll of roong material but on account oi' its relatively small size can be placed within the roll as regularly packaged. v

The term fabric as used herein in connection with either the ap strips, the selvage strips. or the sealing strips is used in its broadest sense, and is intended to include any materials having the general properties of fabric.

What `I therefore claim and desire to secure by Letters Patent is:

1. In roofing, adjacent courses of roofing material, a fabric strip extending along the adjacent edge of each course for fabric-to-fabric seal when the adjacent edges of said courses are brought into joint-forming relationship with each other, and a coating substance applied to at least one of said strips having cohesive ailinity for said strips, but being non-adherent to said courses of roofing material. v

2. In rooflng, adjacent courses of roofing material, a foldable fabric flap strip extending along the adjacent edge of each course for fabric-tofabric seal with each other when the adjacent edges of said courses are brought into joint-forming relationship, and a fabric sealing strip interposed between said flap strips and conned thereby when the flap portions of said flap strips are overfolded upon one another, said sealing strip being coated with a substance having cohesive affinity for said flap strips but'being non-adherent to saidcourses of roofing material.

3. In roofing, adjacent courses of roofing material, a. foldable fabric flap strip extending along the longitudinal edge ofone roofing course and a fixed fabric selvage strip extending along the longitudinal edge vof the other roofing course for fabric-to-'fabric seal with said flap strip when the adjacent edges of salda courses are brought into joint-forming relationship, and a fabric sealing strip interposed between said ap and selvage strips and confined thereby when the flap portion of said ap strip is overfolded upon said selvage strip, said sealing strip. being coated with a substance having cohesive afnity for said flap and selvage strips but being non-adherent to said courses of roofing material.

SIDNEY LANIER EAsoN. l 

